I have noticed that your Facebook authentication stopped working (does not redirect to page/popup) When I clicked the edit of the Facebook in the admin extensions I got the first message below. I re-installed your Facebook module and the message was gone, but the edit of main DNN Facebook authentication threw an error message the second message).

It seems one or the other, do I need to completely uninstall the DNN core for your authentication to work???

In that case the Facebook authentication in the standard DNN login will stop working.

Server Error in '/' Application.

Object reference not set to an instance of an object.

Description:An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details:System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

The source code that generated this unhandled exception can only be shown when compiled in debug mode. To enable this, please follow one of the below steps, then request the URL:

1. Add a "Debug=true" directive at the top of the file that generated the error. Example:

<%@ Page Language="C#" Debug="true" %>

or:

2) Add the following section to the configuration file of your application: